Gyratory crusher.



J. MOINRUE.

GYRATORY CRUSHBR.

APPLIoATIoN FILED-Hoy. 29, 191s.

Patented Aug. 4, 1914 SATFJS ljrkfENT FFICE,

JOHN lVICINRUE, 0F CHICAGO HEIGHTS, ILLINOIS, ASSIGNOR TO CHALMERS (Y:

WILLIAMS, INC., 0F CHICAGO HEIGHTS, ILLINOIS, A CORPORATION NCIS.

OF ILLI- GYRATORY CRUSHER.

Specification of Letters Patent.

Patented A110'. 4, 1914.

Application led November 29, 1912. Serial No. 733,960.

T0 @ZZ whom it may concern Be it known that I, JOHN MCINRUE, a citizen of the United States, and a resident of Chicago Heights, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Gyratory Crushers, of which the following is a specification.

This invention relates to gyratory crushers and relates particularly to the construction of the Crusher head and the means for securing said head to the main shaft of the Crusher.

In gy 'atory crushers, as usually constructed, the means for securing the Crusher head to the gyratory shaft of the crusher consists of a tapered seat formed on the Crusher shaft, the size of which increases downwardly, iitted to which is a correspondingly tapered bore on the crusher head, the bearing in said head being forced into strong frietional engagement with the tapered seat on the shaft by means of a nut threaded to said shaft above the Crusher head and which is adapted to bear upon the upper end thereof. It is found in practice that, in the operation of the machine, the Crusher head tends to become loose on the Crusher shaft, due, probably, to the stretch of the metal forming the head under the pressure to which it is subjected in use.

As my invention relates to means for securing the crusher head to the gyratory shaft, the object of the invention is to provide improved and simplified means for automatically maintaining the Crusher head fast on the Crusher shaft.

As the invention relates to the construction of the Crusher head, the object of the invention is to provide a simplified construction whereby it is rendered possible and practicable to make the crusher heads for the larger sizes of gyratory Crushers from an integral piece of manganese steel, which, owing to its wearing qualities, is particularly well adapted for this service. As is well known, however, the wearing quality peculiar to manganese steel can only be brought out and developed by a pickling process, which, according to any present known process, is not effective for a greater depth than two inches. Thus, the maximum thickness of the metal, when made of manganese steel, cannot y exceed four inches.

Heretofore, it has been proposed to meet this requirement by means of what are known in the trade as mantle heads, which consist of an innner section of cast iron or the like secured directly to the tapered seat on the Crusher shaft, and an outer shell of manganese steel, the outer surface of the inner section of the head and the bore of the outer shell or mantle being correspondingly tapered, substantially in the same manner as the seat on the shaft and the bore of the inner section are tapered. This construction is objectionable for the reason that the inner section tends to work loose on the shaft and the outer section tends to work loose on the inner section, thus doubling the tendency to loosening of the crushcr head and necessitating means for maintaining both sections of the Crusher head in secure engagement with their respective seats. This construction is also objectionable on account of its relatively high cost. Both of these objectionable features will be overcome by means of a head consisting of a solid integral piece of metal, as proposed. a

To effect the foregoing objects, my invention comprises the various features, combinations of features and details of construction hereinafter described and claimed.

In the accompanying drawing, in which my invention is fully illustrated-Fignre 1 is a fragmentary view of the upper end of a gyratory crusher showing the main shaft in elevation and the suspension bearing therefor and a crusher head of my invention secured thereto, both said suspension bearing and crusher head being shown in vertical section. Fig. 2 is a vertical, central, sectional view of my improved crusher head detached from the shaft. Fig. 3 is a fragmentary View showing my improved automatic adjusting means applied to a Crusher head of the mantle type.

Referring now to Figs, l and 2 of the drawings, i designates the gyratory shaft of the Crusher, B the crusher head secured thereto, and C designates, as a whole, the suspension bearing for the gyratory shaft A. Formed on the shaft A is a tapered seat l which increases in size downwardly and which is engaged by the correspondingly tapered bore 2 of the head B. The suspension bearing C forms no part of the present invention and may be of any desired or approved construction, and need not, therefore, be described in detail. To effect the object of my invention as it relates to forming the crusher head B for larger sizes of Crushers from an integral piece of manganese steel, I provide spiral groove 3 on the inner tapered bearing surface 2 of said crusher head, the relation being such that the thickness of said metal forming said head shall not exceed four inches, that is, the distance between adjacent spirals of said groove and the distance between said groove and t-he outer surface of said head shall not exceed and will preferably be slightly less than four inches, thus rendering it possible for the pickling process, essential to bring out or develop the wearing quality of the manganese steel, to penetrate the entire mass of said head. Said spiral groove 3 may be conveniently formed by means of a suitable core when casting said head B. To effect the object of my invention as it relates to improved means for automatically maintaining the head B tight on the gyratory shaft A, l provide nuts 4 and 5, one a righthand nut and the other a lefthand nut, which respectively engage corresponding` screw threads on the gyratory shaft A. As shown, the nut 4 has a righthand thread and the nut 5 a lefthand thread. In setting up the crusher, both of the nuts 4 and 5 are tightened so that they will bear iirmly on the upper end of the head B, this being effected by recessing the upper nut 4 on its under side, as shown at 6, to receive the lower nut 5, the recess 6 in said nut 4 being of such depth that said nut 4 will extend downwardly outside of the nut 5 so as to bear on t-he upper end of the head B in the manner desired, and leave a small space between. the inner end of the recess 6 and the top of the nut 5, thus providing for slight movement of said nuts 4 and 5 endwise of the gyra-tory shaft A, relatively to each ot-her. Said nuts 4 and 5 are secured to the head B so that, if said head wor rs loose on the gyratory shaft A, angular movement of said head on said shaft will be imparted to both of said nuts. As shown, said means consists of a key or dowel pin 7 inserted into a key way 8 formed partly in the upper edge of the head B and partly in the lower edges of the nuts 4 and 5. With the described construction, it is obvious that any slight angular movement of the head B on the shaft A will impart a corresponding movement to the nuts 4 and 5, which, if in one direction, will operate to tighten one of said nuts and loosen the other, and vice versa. Thus, if the rotation is from right to left, angular movement of said head will operate to tighten the right-hand nut 4 and to loosen or unscrew the left-hand nut 5, while angu lar movement of said head from left to rightwill operate to tighten the left-hand nut 5 and to loosen the right-hand nut 4, the space 7 between said nuts providing for the necessary movement of said nuts relatively to each other. Thus, angular movement of said head in either direction will operate to tighten one or the other of said nuts and to force said head into strong frictional engagement with its tapered seat on the shaft fr, thereby preventing all plcy of said head on said shaft.

For purposes of illustration, l have, in Fig. 3 of the drawing, shown my improved means for automatically maintaining the Crusher head tight on the gyratory shaft applied to a mantle type of bearing. Refer ring to said Fig. 8, A designates the gyratory shaft, B the Crusher head consisting of an inner section which may be made of cast iron or other suitable metal, and an outer shell b of manganese steel, the inner section Z) being secured to the shaft A and the outer shell or mantle ZJ being secured to the inner section b by means of correspondingly tapered bearings, substantially in the same manner as in Fig. 1 the head B is secured to the shaft A. The upper end of the mantle b preferably extends slightly above the upper end of the inner section b of the head and the tapered bearings in said mantle b and in said section b are adapted to be forced and maintained in strong frictional engagement with their bearings on saidinner section b and on the shaft A, respectively, by means of the nuts 4 and 5, which are substantially identical with the nuts 4 and 5 shown in Fie'. l, the left-hand nut 5 bearing on the upper end of the mantle section adjacent to its inner edges and the right-hand nut 4 bearing on the upper end of said mantle section adjacent to its outer edge. Said nuts 4l and 5 are keyed to the mantle b by the key and maintain said mantle section b tight on the inner section Z) of the head and said inner section b tight on the shaft A all substantially in the same manner as said nuts 4 and 5 will maintain the head B tight on the shaft A as heretofore described. Said Fig. 8 also illustrates the objectional construction of Crusher heads now in common use in the larger sizes of gyratory Crushers comprising the inner section b and the outer mantle section 5, which it is one of the objects of the present invention to overcome.

l claim l. ln a gyratory Crusher, the combination of a gyratory shaft, and a crusher head, said shaft and head being provided with engaging` tapered surfaces, and means for securing and maintaining the bearing on said head in strong frictional engagement with the bearing on said shaft, said means comprising right-hand and left-hand nuts threaded to said shaft, both of which bear upon the upper end of said crusher head, and means for connecting said nuts to said head whereby angular' movement of said head on the crusher shaft will be imparted to said nuts, substantially as described.

2. In a gyratory Crusher, the combination of a gyratory shaft, and a Crusher head, said shaft and head being provided with engaging tapered surfaces, and means for securing and maintaining the bearing on said head in strong frictionai engagement with the bearing on said shaft, said means comprising right-hand and left-hand nuts having the same pitch threaded to said shaft, both of which bear upon the upper end of said Crusher head, and a key which connects said nuts to said head, whereby angular movement of said head on said gyratory shaft Will be imparted to said nuts, While permitting movement of said nuts toward and from said head, substantially as described.

3. In a gyratory Crusher, the combination of a gyratory shaft and a crusher head, said shaft and head being provided With engaging tapered surfaces, and means for securing and maintaining the bearing on said head in strong frictional engagement with the bearing on said shaft, said means comprising right-hand and left-hand nuts threaded to said shaft, both of which bear upon the upper end of said head, the upper nut being provided with a recess in its under side to receive the lower nut, and means for connecting said nuts to said head, said connecting means being constructed and arranged to impart angular movement to the nuts with said head relatively to said shaft and to permit movement of said nuts toward and from said head, substantially as described.

In testimony that I claim the foregoing as my invention, I aiiix my signature in the presence of two subscribing Witnesses this 19 day of November, A. D. 1912.

JOHN MGINRUE.

Witnesses:

J AMES M. IVHELAN, EMMA BRAUER.

Copier: of this patentmay be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, '.D. C. 

